[R] na.rm in sd()

[Thomas Lumley]

On Wed, 29 Jan 2003, Heberto Ghezzo wrote:

> Hello, I think this qualify as a bug
>  > x<-c(1,2,3,4,NA,6,7)
>  > mean(x)
> [1] NA
>  > mean(x,na.rm=T)
> [1] 3.833333
>  > sd(x)
> Error in var(as.vector(x)) : missing observations in cov/cor
>  > sd(x,na.rm=T)
> Error in sd(x, na.rm = T) : unused argument(s) (na.rm ...)
>  > var(x)
> Error in var(x) : missing observations in cov/cor
>  > var(x,na.rm=T)
> [1] 5.366667
>  >
> why sd() does not recognize the na.rm=T parameter, while var does?
>
> R 1.6.1 on Win98
>

It works for me in R 1.6.1 on Windows.

 > x<-c(1,2,3,4,NA,6,7)
 > sd(x,na.rm=TRUE)
  [1] 2.316607

and looking at the code for sd it certainly should.  Are you sure you
don't have another defintion of sd() lurking?


	-thomas